<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>画线</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
    </style>
    <script src="../lib/three.js"></script>
</head>
<body>
<script>
    // 创建场景
    const scene = new THREE.Scene();
    // 创建相机
    const camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 500);
    // 设置相机定位
    camera.position.set(0, 0, 100);
    camera.lookAt(0, 0, 0);
    // 创建渲染器
    const renderer = new THREE.WebGL1Renderer();
    // 设置渲染器大小
    renderer.setSize(window.innerWidth, window.innerHeight);
    // 挂载到页面
    document.body.appendChild(renderer.domElement);

    // 绘制线
    const material = new THREE.LineBasicMaterial({
        color: "red"
    });
    const points = [];
    points.push(new THREE.Vector3(-10, 0, 0));
    points.push(new THREE.Vector3(0, 10, 0));
    points.push(new THREE.Vector3(10, 0, 0));

    const geometry = new THREE.BufferGeometry().setFromPoints(points);
    const line = new THREE.Line(geometry, material);

    // 添加线到场景中
    scene.add(line);
    // 渲染到场景中
    renderer.render(scene, camera);
</script>
</body>
</html>
